package com.meiqiang.chat.netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * TextWebSocketFrame 表示一个文本帧
 */
public class MyTextWebSocketFrameHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {

        System.out.println("服务器收到消息 ："+msg.text());

        //回复消息
        ctx.writeAndFlush(new TextWebSocketFrame("服务器时间" + LocalDateTime.now()+" "+msg.text()));

    }

    /**
     * 当web客户端连接后就会触发该方法
     * @param ctx
     * @throws Exception
     */
    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        //id 表示一个唯一的值,LongText 是唯一的，ShortText不是
        System.out.println("handlerAdded 被调用"+ ctx.channel().id().asLongText());
        System.out.println("handlerAdded 被调用"+ ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemoved 被调用"+ ctx.channel().id().asLongText());
        System.out.println("handlerRemoved 被调用"+ ctx.channel().id().asShortText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}
